objective-c: If an ivar is (1) the first ivar in a root class and (2) named `isa`, 
then it should get the same warnings that id->isa gets. // rdar://11702488


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158938 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed